Stage IVA Thymoma AJCC v9

**Semantic type:** Neoplastic Process

**Definition:** Stage IVA includes: (Any T, N1, M0); (Any T, N0-N1, M1a). N0: No involvement of regional lymph node(s). N1: Involvement of anterior (perithymus) lymph nodes. M0: No distant metastasis. M1a: Separate pleural or pericardial nodule(s). (AJCC 9th ed.)